cmhc的介绍里有这么一段: CMHC is Canada’s premier provider of mortgage loan insurance, mortgage-backed securities, housing policy and programs, and housing research. . G) t4 a k9 v7 ]! Q- A6 s2 v Y - B- `0 f# T2 [7 bmortgage-backed securities不就是“两房”做的房地产为抵押品的债券吗。) |- E) p% E" ?3 Y